-67.51% is the change from 951 to 309
Calculation steps:
[( 309 - 951 ) ÷ 951] x 100 = -67.51%
Formula
Percentage change = [(309 - 951) / 951] x 100
Subtract the new number by the original number
309 - 951 = -642
-642 ÷ 951 = -0.6750788643533123
-0.6750788643533123 x 100 = -67.51%